Bump Azure.Identity from 1.11.4 to 1.12.0 in /src

Bumps [Azure.Identity](https://github.com/Azure/azure-sdk-for-net) from 1.11.4 to 1.12.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.Identity_1.11.4...Azure.Identity_1.12.0)

---
updated-dependencies:
- dependency-name: Azure.Identity
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

src/azure-cost-cli.csproj

@@ -28,7 +28,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="Azure.Identity" Version="1.11.4" />
+      <PackageReference Include="Azure.Identity" Version="1.12.0" />
       <PackageReference Include="CsvHelper" Version="32.0.3" />
       <PackageReference Include="JmesPath.Net" Version="1.0.330" />
       <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />